Efficiency and Equilibrium when Preferences are Time-Inconsistent
We consider an exchange economy with time-inconsistent consumers whose preferences are additively separable. When these consumers trade in a sequence of markets, their time-inconsistency may introduce a non-convexity that gives them an incentive to trade lotteries. If there are many consumers, competitive equilibria with and without lotteries exist. The existence of symmetric equilibria may require lotteries. Symmetric equilibria that do not require lotteries are generically locally unique. Allocations that are Pareto efficient at the initial date are also renegotiation-proof. Competitive equilibria are Pareto efficient in this sense, and for generic endowments, if and only if preferences are locally homothetic. For non-homothetic preferences, the introduction of lottery markets has an ambiguous impact on the equilibrium welfare of consumers at the initial date.
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|Date of creation:||2004|
|Date of revision:|
|Publication status:||Published in Journal of Economic Theory, vol.�132, n°1, janvier 2007, p.�493-506.|
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- Laibson, David, 1997.
"Golden Eggs and Hyperbolic Discounting,"
The Quarterly Journal of Economics,
MIT Press, vol. 112(2), pages 443-77, May.
- Harris, Christopher & Laibson, David, 2001.
"Dynamic Choices of Hyperbolic Consumers,"
Econometric Society, vol. 69(4), pages 935-57, July.
- Christopher Harris & David Laibson, 1999. "Dynamic Choices of Hyperbolic Consumers," Harvard Institute of Economic Research Working Papers 1886, Harvard - Institute of Economic Research.
- Faruk Gul & Wolfgang Pesendorfer, 2004.
"Self-Control and the Theory of Consumption,"
Econometric Society, vol. 72(1), pages 119-158, 01.
- Carrillo, Juan D & Mariotti, Thomas, 2000. "Strategic Ignorance as a Self-Disciplining Device," Review of Economic Studies, Wiley Blackwell, vol. 67(3), pages 529-44, July.
- Krusell, Per & Kuruscu, Burhanettin & Smith Jr., Anthony A, 2001.
"Equilibrium Welfare and Government Policy with Quasi-Geometric Discounting,"
CEPR Discussion Papers
2693, C.E.P.R. Discussion Papers.
- Krusell, Per & Kuruscu, Burhanettin & Smith, Anthony Jr., 2002. "Equilibrium Welfare and Government Policy with Quasi-geometric Discounting," Journal of Economic Theory, Elsevier, vol. 105(1), pages 42-72, July.
- Per Krusell & Burhanettin Kuruscu & Anthony A. Smith Jr., 2001. "Equilibrium Welfare and Government Policy with Quasi-Geometric Discounting," Temi di discussione (Economic working papers) 413, Bank of Italy, Economic Research and International Relations Area.
- Per Krusell & Burhanettin Kuruscu & Anthony A. Smtih, Jr., . "Equilibrium Welfare and Government Policy with Quasi-Geometric Discounting," GSIA Working Papers 2001-06, Carnegie Mellon University, Tepper School of Business.
- Stiglitz, Joseph E, 1982. "The Inefficiency of the Stock Market Equilibrium," Review of Economic Studies, Wiley Blackwell, vol. 49(2), pages 241-61, April.
- Erzo G. J. Luttmer & Thomas Mariotti, 2003. "Subjective Discounting in an Exchange Economy," Journal of Political Economy, University of Chicago Press, vol. 111(5), pages 959-989, October.
- Kehoe, Timothy J. & Levine, David K. & Prescott, Edward C., 2002.
"Lotteries, Sunspots, and Incentive Constraints,"
Journal of Economic Theory,
Elsevier, vol. 107(1), pages 39-69, November.
- Robert J. Barro, 1999. "Ramsey Meets Laibson In The Neoclassical Growth Model," The Quarterly Journal of Economics, MIT Press, vol. 114(4), pages 1125-1152, November.
- Milton Friedman & L. J. Savage, 1948. "The Utility Analysis of Choices Involving Risk," Journal of Political Economy, University of Chicago Press, vol. 56, pages 279.
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